
We made some television history the other night: in a test for the NFL International Distribution, Adrian from TV2Go and us folks at IMG Mediahouse have successfully brought a 32APSK encoded signal across the Atlantic, with a datarate of 30Mbps using a 9MHz carrier!
Since the start of the current NFL season in 2009, part of my job is to bring in feeds that originate in the US for an uplink stateside to NSS7. Our clients then downlink these feeds in Europe. In North America, DirectTV offers the NFL (and nearly 200 other channels) to domestic customers via their fleet of ten satellites. Using MPEG2 and H264 encoding, QPSK and 8PSK modulation are commonplace in satellite transmissions.

However satellite bandwidth is expensive, and we’re dealing with demands of ever increasing datarates. Compression alone will only get us so far, so the only other way to increase throughput would be to increase phase modulation on the TX path. Lucky for us, the DVB-S2 spec has another trick or two up its sleeve.
















